ANALYSIS OF METHODS FOR DETERMINING AND APPLYING HEAT PARAMETERS OF HIGH FREQUENCY PULSE VOLTAGE CONVERTERS

2019 ◽  
Author(s):  
Leonid Potapov ◽  
Aleksey Shkolin
Keyword(s):  
High Frequency ◽  
Reference Data ◽  
Supply Voltage ◽  
Thermal Characteristic ◽  
Pulse Voltage ◽  
Electrical Parameters ◽  
Cooling Conditions ◽  
Thermoelectric Model ◽  
Transient Thermal ◽  
Frequency Pulse

It is shown that the thermal resistance of the junction-case is determined through a partial heat flux and is some characteristic of the crystal fastening in the case of high-frequency pulse voltage converters. It is practically impossible to measure this resistance in mass production because of the high complexity and low accuracy, although this resistance is indicated in the reference data sheet for each IC. To exclude the possibility of hidden defects that are not detected during the control of electrical parameters, it is proposed to use one hundred percent control of thermal parameters by way of comparison with a standard. The transient thermal characteristic can be determined experimentally for a specific IC and specific cooling conditions. After approximation by its exponents, it is possible to construct a thermoelectric model and use it to study the change in the temperature of the IC chip with changing various parameters (supply voltage, load power, etc.).

HEAT ELECTRICAL SIMULATION OF HIGH FREQUENCY PULSE VOLTAGE CONVERTERS

2018 ◽  
Author(s):  
Леонид Потапов ◽  
Leonid Potapov ◽  
Алексей Школин ◽  
Aleksey Shkolin ◽  
Дмитрий Гадашев ◽  
...  
Keyword(s):  
High Frequency ◽  
Pulse Voltage ◽  
Electrical Simulation ◽  
Frequency Pulse

scholarly journals Determination of transient thermal characteristics for thermal electric behavioral models of integrated circuits

2020 ◽  
Vol 9 (3) ◽  
pp. 933-942
Author(s):  
Drakin A. Yu ◽  
Potapov L. A. ◽  
Shkolin A. N.
Keyword(s):  
Integrated Circuits ◽  
Least Squares Method ◽  
Thermal Characteristic ◽  
Thermal Characteristics ◽  
Structural Function ◽  
Behavioral Models ◽  
Marquardt Algorithm ◽  
Thermoelectric Model ◽  
Transient Thermal

In the current study, it was tried to describe a method for determining thermal characteristics of integrated micro-circuits to identify thermal parameters of multidisciplinary (thermal-electric) behavioral models. The problem is solved on the example of high-frequency pulse voltage converters. A solution was proposed to refine the minimum structure of the thermoelectric model based on an iterative least squares method using the Levenberg-Marquardt  algorithm, as well as a graph of the spectral den-sity of time constants. This made it possible to reduce the influence of the filtering factor in the  deconvolution operation when building a thermal model using the structural function of the thermal characteristic transition. Also, the results obtained can be used to build integrated circuits (IC) behavioral models, taking into account the thermal processes occurring in them.

scholarly journals Dual Quasi-Resonant Controller Position Observer Based on High Frequency Pulse Voltage Injection Method

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 213266-213276
Author(s):  
Yi Mao ◽  
Yi Du ◽  
Zhuofan He ◽  
Li Quan ◽  
Xiaoyong Zhu ◽  
...  
Keyword(s):  
High Frequency ◽  
Pulse Voltage ◽  
Injection Method ◽  
Resonant Controller ◽  
Position Observer ◽  
Frequency Pulse

Partial Discharge Features for Power Electronic Transformers Under High-Frequency Pulse Voltage

2021 ◽  
Vol 49 (2) ◽  
pp. 845-853
Author(s):  
Jun Jiang ◽  
Bendong Zhang ◽  
Zhi Li ◽  
Prem Ranjan ◽  
Jiawei Chen ◽  
...  
Keyword(s):  
High Frequency ◽  
Partial Discharge ◽  
Pulse Voltage ◽  
Power Electronic ◽  
Frequency Pulse

scholarly journals Measurement of Electrical Properties of Superconducting YBCO Thin Films in the VHF Range

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3360
Author(s):  
Yakir Dahan ◽  
Eldad Holdengreber ◽  
Elichai Glassner ◽  
Oz Sorkin ◽  
Shmuel E. Schacham ◽  
...  
Keyword(s):  
Thin Films ◽  
Theoretical Model ◽  
Quality Factor ◽  
High Frequency ◽  
Unit Length ◽  
Superconducting Thin Films ◽  
Electrical Parameters ◽  
Very High Frequency ◽  
Production Constraints ◽  
Very High

A new measurement technique of electrical parameters of superconducting thin films at the Very High Frequency (VHF) range is described, based on resonators with microstrip (MS) structures. The design of an optimal resonator was achieved, based on a thorough theoretical analysis, which is required for derivation of the exact configuration of the MS. A theoretical model is presented, from which an expression for the attenuation of a MS line can be derived. Accordingly, simulations were performed, and an optimal resonator for the VHF range was designed and implemented. Production constraints of YBa2Cu3O7 (YBCO) limited the diameter of the sapphire substrate to 3″. Therefore, a meander configuration was formed to fit the long λ/4 MS line on the wafer. By measuring the complex input reflection coefficients of a λ/4 resonator, we extracted the quality factor, which is mainly affected by the dielectric and conductor attenuations. The experimental results are well fitted by the theoretical model. The dielectric attenuation was calculated using the quasi-static analysis of the MS line. An identical copper resonator was produced and measured to compare the properties of the YBCO resonator in reference to the copper one. A quality factor of ~6·105 was calculated for the YBCO resonator, three orders of magnitude larger than that of the copper resonator. The attenuation per unit length of the YBCO layer was smaller by more than five orders of magnitude than that of the copper.

scholarly journals The Effect of High Frequency Pulse on the Discharge Probability in Micro EDM

2017 ◽  
Vol 281 ◽  
pp. 012031
Author(s):  
Y Liu ◽  
Y Qu ◽  
W Zhang ◽  
F Ma ◽  
Z Sha ◽  
...  
Keyword(s):  
High Frequency ◽  
Micro Edm ◽  
Frequency Pulse
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